Q: What are the prime factors of the number 201,681,810?

 A: 2, 3, 5, 11, 137, 1487

Why are those the prime factors of the number 201,681,810?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 201,681,810

201,681,810
Factor Arrows
2100,840,905
Factor Arrows
333,613,635
Factor Arrows
311,204,545
Factor Arrows
52,240,909
Factor Arrows
11203,719
Factor Arrows
1371,487

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 5, 11, 137, 1487

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 11 x 137 x 1,487 = 201,681,810

This can also be written as 21 x 32 x 51 x 111 x 1371 x 1,4871 = 201,681,810

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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